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The dynamics of ethanol production/consumption in baker's yeast were studied under feed- rate controlled conditions. The yeast was grown on molasses in an 8-l fed-batch reactor and experiments were done at cell concentrations between 5 and 65 g l−1. Small changes in the feed rate were made around a feed rate corresponding to the critical growth rate, at which the yeast cell metabolism switches bet
Objective: Varying degrees of inter-organizational collaboration concerning children at risk has grown rapidly since the 1980s. Collaboration is understood to provide a more holistic view of the child’s needs, lead to better care and treatment, more efficient law enforcement as well as increase knowledge in general. The aim of this presentation is to explore processes and effects, by highlighting
Using a system analysis approach compares different systems for handling and treatment of toilet waste and organic household waste. Design issues considered are source separation of urine, use of vacuum toilets and advanced nutrient recovery processes such as Reverse Osmosis (RO). All of the studied systems have low emissions of eutrophy ing compounds. Other environmental effects are mainly relate
The empirical part of this study is based on a survey of 600 Swedish households and a number of interviews where questions about residential energy behaviour and possible policy instruments for change were raised. The study provides insight into current behavioural patterns and gives a bottom-up perspective on the realistic perspective potentials for change and ways to achieve them. Residential en
Ectomycorrhiza (EM) is a symbiosis between soil living fungi and the roots of woody plants. EM fungal communities are important in forest nutrient cycling, they are species rich and their structures vary between habitats and over time. An EM community in a phosphorus-poor forest was exposed to apatite and EM mycelia actively colonizing ingrowth bags were analyzed. Internal transcribed spacer (ITS)
This article presents a spiral process model for an iterative case study on quality monitoring, conducted in an industrial environment. In a highly iterative project, everything seems to happen at the same time: analysis, design and testing. We propose a spiral process model for case studies, and present a study conducted according to the proposed process. In the study, metrics collected from thre
Intra locus sexual conflict (IASC) occurs when sex-specific optima for a certain trait differs, and the trait is controlled by shared genes across the sexes. Sexual dimorphism is recognized to be a sign of previous or ongoing sexually antagonistic selection in separate sexed species, while hermaphrodites have been overlooked in the past due to their monomorphic appearance. Despite this, hermaphrod
Oats have been gaining huge popularity in the past three decades, due to its well-known positive effects in serum cholesterol levels, glucose homeostasis and insulinemia. A growing body of evidence shows a link between obesity, metabolic dysfunctions and gut microbiota composition. The main objective of the project is to develop an oat bran and milk based fiber-rich beverage and an oat based yogur
Classification of surfaces in the near field using millimeter-wave radar commonly considers the use of polarization based methods for road condition monitoring. When a surface consists of larger structures one instead wishes to monitor the surface topography. Analysis of scattering from rough surfaces is highly complex and relies on prior knowledge of surface structure. In this work a device movin
Detta examensarbete ger ett förslag på en ny järnvägsstation i Kirunas nya centrum. I Kiruna pågår just nu en stadsomvandling, där en tredjedel av staden flyttas tre kilometer österut på grund av markdeformationer från Kirunagruvan. Detta innebär stora förändringar för Kirunaborna men även stora förändringar i stadsbilden, då majoriteten av centrum har eller kommer rivas och byggas upp igen i nya This thesis gives a suggestion for a new railway station in the new city center of Kiruna, Sweden. Kiruna is now experiencing an urban transformation, where one third of the population and the city moves three kilometers to the east due to ground deformations coming from the Kiruna iron ore mine. This leads to huge changes for Kiruna’s population, but also huge changes in the cityscape, since most
The issue of pharmaceutical pollution has recently gained attention on the international political agenda as several actors have raised concern for its negative impact on ecosystems, human health, and livelihoods in emerging economies where an increasing share of the pharmaceutical production is located due to the cheaper labor and less stringent environmental regulations. In 2019, the OECD publis
Forced air convection systems are the most preferred design of choice in many of the industrial-scale convection ovens. In this study, experimental investigation on convective heat transfer and mass transfer within a forced air convection oven was performed at different oven temperatures (100℃, 110℃ and 120℃) and at flow velocity (2 m/s, 3 m/s and 4 m/s) using potato slices (10*10*60 mm) as model
Antarctic krill, Euphausia superba, a polar ocean specialist, thrives in the Antarctic severe physical conditions. The krill life cycle consists of strategies that have enabled and supported the species’ dominance of the Antarctic Ocean. Sea Ice extent and duration creates condition that are crucial for survival of the Furcilia larvae. The species has flexibility to food resources and is omnivorou
Methane is a potent greenhouse gas that plays a major role in climate change. Significant uncertainty exists in the estimates of emissions from natural methane sources. This uncertainty in data is one of the primary scientific challenges in climate model. Geological seepage considered as the second largest natural source of methane after wetlands and today is recognized as a major contributor to a
